use ISO7240 as a level shifter as well?

Xiaochen (Sean)Xu

our customer asked if they can use ISO7240 as a level shifter. i.e. Supply A is 5V and Supply B is 3.3V. So input is 5V logic and output logic is 3.3V.

Thanks!

over 12 years ago

0 Thomas Kugelstadt over 12 years ago

TI__Mastermind 28265 points

Yes , he can use it as level shifter.

regards, Thomas

0 Mitesh Sirodaria over 11 years ago in reply to Thomas Kugelstadt

Intellectual 880 points

Hello,

I am also using same component for my project but if I am having supply A of 32V and supply B of 3.3V will it work as level shifter? Need some urgent response if anyone can help.

Thank you

0 John Griffith over 11 years ago in reply to Mitesh Sirodaria

TI__Mastermind 21811 points

Hi Mitesh,

The ISO7240 can only handle VCC voltages of 3.15 to 5.5 volts, and the inputs can only handle up to 6 volts. Please see page 3 of the datasheeet.

You would have to levelshift the 32 volt signals before interfacing them with the ISO7240.

Thanks,

John

0 Mitesh Sirodaria over 11 years ago in reply to John Griffith

Intellectual 880 points

Hi John,

Thanks for your reply, as read in previous query I can use it for level shifting from 5V to 3.3V, but can I use it for reverse operation for level shifting ( Supply A of 3.3V and Supply B of 5V)?

Thank you,

Mitesh

0 John Griffith over 11 years ago in reply to Mitesh Sirodaria

TI__Mastermind 21811 points

Hi Mitesh,

All of our isolators can work as level shifters in both directions since the outputs are push-pull output stages and pull high to the VCC on that side of the chip.

Thanks,

John

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use ISO7240 as a level shifter as well?